Bernard StoneWhen Prince Harry and Meghan Markle landed at Birmingham Airport on August 26, 2026, their return to Britain ended six years of California life — and quietly started a financial chapter that millions of Americans abroad will recognize. Meghan is a US citizen. Her move does not change that, and it does not release her from the IRS.
For the roughly 9 million Americans living outside the United States — according to State Department estimates — the Sussex family's new Cotswolds arrangement is a useful mirror. Dual-country living looks glamorous on the outside. The tax paperwork is something else entirely.
What Harry and Meghan's Move Actually Reveals About US Taxes
Most countries tax their residents. The United States taxes its citizens — regardless of where they live. This citizenship-based taxation system means Meghan, as a US passport holder, must still file Form 1040 every year, report foreign financial accounts under the Foreign Bank Account Report (FBAR) rules, and comply with the Foreign Account Tax Compliance Act (FATCA).
None of this changes because she moved to the UK. None of it is waived by the US-UK Tax Treaty of 1975. The treaty helps avoid double taxation in many situations — but it does not eliminate the US filing obligation.
According to the IRS international taxpayer guidance, US citizens and resident aliens must report worldwide income and file all applicable returns regardless of where they reside or whether they pay taxes in another country.
That single paragraph has real consequences for any American who has relocated abroad — whether to follow a partner, a career, or simply a better quality of life.
The Questions American Expats Are Actually Asking
The financial questions that arise from a Meghan-style transatlantic move are not abstract. They come up in real wealth management meetings every week. Here are the most common ones — and what advisors actually say.
"Does moving to the UK mean I stop filing US taxes?"
No. US citizens must file a federal return every year regardless of residency. The Foreign Earned Income Exclusion (FEIE) allows you to exclude up to a set threshold of foreign-earned wages from US income tax — but investment income, rental income, and capital gains are not covered by the FEIE. You still file. You may owe less, but the obligation stays.
"Do I need to report my UK bank account?"
Yes, if the aggregate balance of all your foreign financial accounts exceeded $10,000 at any point during the year. The FBAR (FinCEN Form 114) is due by April 15, with an automatic extension to October 15. The civil penalty for non-willful failure to file starts at $10,000 per violation. For willful non-filing, penalties can reach the greater of $100,000 or 50% of the account's value per year.
"What about a UK ISA — it's tax-free, right?"
Under UK law, yes. Under US law, no. The IRS does not recognize the UK Individual Savings Account (ISA) as a qualifying tax-advantaged plan. Any dividends, interest, or gains earned inside a UK ISA are fully taxable in the US in the year earned — even if you never touch the money.
"Can I own property in both the US and UK without complications?"
You can own it. Selling it is where the complications start. If you sell UK property while living there as a US citizen, the US will want to know about the capital gain. The UK may grant Principal Private Residence relief — but the US calculates the gain separately, and often differently. Currency fluctuation also matters: the gain for IRS purposes is calculated in US dollars from the date of purchase.
When the Numbers Hit Home: A Concrete Scenario
Take the situation of a 41-year-old product manager from Austin named Michael, who joined a London tech company in February 2026 on a two-year assignment. He earns $155,000 per year equivalent in sterling, keeps his Austin home (current value: $475,000, original purchase price: $295,000), and opens a UK current account plus a Stocks and Shares ISA.
By September 2026, Michael's combined UK accounts total £92,000 (approximately $119,000). That triggers his FBAR obligation for tax year 2026 — a form most people file without issue, but only if they know it exists.
His ISA earns £3,800 in dividends during the year. Under UK rules: tax-free. Under US rules: fully taxable ordinary income. He owes US tax on that £3,800 regardless of the UK treatment.
The if/then breakdown:
- If Michael decides to sell his Austin home in November 2026 while UK-resident → the gain is $180,000 ($475k minus $295k), reduced by the $250,000 single-filer exclusion under Section 121 → taxable gain is $0 in this case, but he must still report the sale on Schedule D
- If his Austin home had appreciated to $600,000 instead → taxable gain of $55,000 → approximately $8,250 in federal capital gains tax at the 15% long-term rate, potentially plus a state tax obligation
- If Michael fails to file the FBAR for his £92,000 in UK accounts → minimum $10,000 civil penalty for non-willful failure, plus a separate FATCA flag from his UK bank to the IRS
- If he gets ahead of this with a cross-border wealth advisor before December 31, 2026 → a single consultation costing $350-$600 can identify whether his ISA income needs quarterly estimated payments, whether the Austin sale should happen before or after he returns to the US, and whether he needs to make treaty elections before filing season
That $350-600 advisory fee versus a potential $10,000-plus penalty exposure is the core calculus. For anyone in Michael's position — or anyone who sees themselves in his position — it is not a close call.
For more on how royal family events have historically prompted Americans to revisit their own estate planning, see our coverage of what the royal family's financial headlines mean for US estate planning in 2026.
What the 2026 Landscape Means Specifically
Two 2026 developments make cross-border US-UK financial planning more time-sensitive than in prior years.
First, the UK's Spring Budget 2026 eliminated the long-standing non-domicile tax regime, which had allowed certain wealthy foreign nationals to shield non-UK income from UK taxation for up to 15 years. While this rule primarily affected non-Americans, its removal signals a broader tightening of the UK's tax posture toward people with cross-border income. The UK is actively closing gaps in international tax collection — which affects the environment that American expats are operating in.
Second, FATCA data-sharing between UK financial institutions and the IRS has grown significantly more systematic. UK banks are now required to identify and report account holders with US indicators — a US address, a US phone number, a US place of birth — to HMRC, which passes the data to the IRS. If you have been informally managing US and UK finances without professional coordination, the probability of detection for filing gaps has risen considerably.
What to Do Before December 31, 2026
The April 2027 deadline for 2026 tax returns may feel distant. But the decisions that determine your exposure for 2026 happen now, before the year closes.
Key actions for Americans with UK ties in 2026:
Review your FBAR threshold. If any combination of foreign accounts — checking, savings, ISA, pension, brokerage — has crossed $10,000 at any point this year, you have an FBAR filing obligation due by April 15, 2027.
Assess your ISA income. Any dividends or gains inside a UK ISA need to be reported on your US return as ordinary income. A wealth advisor can confirm the correct reporting treatment and whether estimated tax payments are needed.
Time any property sales carefully. Whether you are selling a US home while abroad or considering a UK property purchase, the interaction between US capital gains rules, Section 121 exclusions, currency translation, and UK CGT is complex enough that pre-sale advice almost always pays for itself.
Check treaty elections. The US-UK Tax Treaty includes several elections — notably for pension treatment — that can prevent double taxation but must be claimed actively. Most US expats who move abroad without professional help miss these in their first year.
Prince Harry and Meghan Markle's return to Britain has prompted a wave of curiosity about what their life in the Cotswolds looks like. For Americans watching from the other side of the Atlantic, the more useful question is not whether they will get along with the royal family. It is whether your own cross-border financial situation is as organized as it needs to be.
The IRS does not stop being interested in you because you moved. Planning for that reality is the practical takeaway from the House of Windsor's latest chapter.
This article provides general financial and tax information for educational purposes only. It does not constitute professional tax, legal, or financial advice. US tax rules for international situations are complex and vary significantly by individual circumstance. Consult a qualified cross-border wealth advisor or tax professional for guidance specific to your situation.
